Machine for cutting paper



(No Model.) 4 Sheets-Sheet 1'.

R. BINNS.

MACHINE 'FOR CUTTING PAPER.

No. 253,967. v Patented Feb. 21,1882.

(No Model.) 4 Sheets-Sheet 2 R. BINNS.

MACHINE F03. CUTTING PA/PER. I No. 253,967. Patented Feb. 21,1882.

n, PETERS. Phoiwplhugrap'w. Walhingim. m a

(No Model.) 4 Sheets-Sheet 3 R. BINNS.

MACHINE FOR CUTTING PAPER.

Patented Feb. 21,1882.

4 Sheets- -Sheef 4. R. BINNS.

LMAGHINE- FOR CUTTING PAPER.

(No Model.)

No. 253,967. Patented Feb. 21,1882

Gag 2.

damaw S IG M/I/U UNITED STATES PATENT OFFICE.

ROBERT BINNS, on scorn WINDHAM, CONNECTICUT.

MACHINE FOR CUTTING- PAPER.

SPECIFICATION forming part of Letters Patent No. 253,967, dated February 21, 1882.

To all whom it may concern.-

Be it known that I, ROBERT BlNNs, of South Windham, in the county of Windham and State of Connecticut, have invented certain new and useful Improvements in Machines for Cutting Paper from a Roll or Strip, of which the followin g is a specification.

My invention relates to improvements in paper-cutting machines in which the paper is fed from a roll or strip between a pair of shearblades, one of which blades is mounted on an elastic cushion, and a clamp-bar is so operated in connection with the blades as to clamp the paper and hold it against the upper blade during the cutting operation; and the objects of my improvement are, first, to lock the paper while it is being cut, so that the action of the feed-rollers may be continuous; and, second, to so arrange the blades in connection with the elastic cushion that they will cut nicely and smoothlyeven though they may not be ground so as to be perfectly true and straight. I attain these objects by the mechanism illustrated in the accompanying drawings, in which-- Figure 1 is a front elevation with cam-shaft E broken away. Fig. 2 is an end view; Fig. 3, a transverse section on line as w of Fig. 1. Fig. 4 is a detached plan view; Fig. 5, a detached View, showing a transverse section of the clamping-bar; and Fig. 6 is an enlarged transverse section of the swinging shear-blade as adapted for operation by means of a camshaft located upon the inside of said swinging blade. 1

A designates the active one of a pair of feeding-rollers, and B the lesser roller for acting in connection with the same, the roller A being driven by means of gear a, which connects it to the main shaft 0, to which power is applied in any ordinary manner. The shaft 0 bears upon it a cone, D, bearing a belt or band, I), which communicates motion to a companion vcone, D, located upon the supplemental shaft Application filed April 30, 1881. (No model.)

g, so mounted upon said frame as to swing under the blade 0, and it is set with its edge on an incline to the edge of the blade 6, as clearly shown by the plan view, Fig. 4, so that as the frame oscillates to carry the blade 1 under the blade 0 the cutting operation will take place only at one point. In other words, the edges of the two blades cross each other. This blade 9 is held in place upon its bed by means of small screws h, Fig. 6, which, however, are so fitted as to allow a rocking motion of said blade.

Underneath the blade g, I placearubber cushion, '5, as clearly shown in Fig. 6, and in the frame I arrange adjusting-screws j, for adjusting this rubber cushion and the blade 9 so that it strikes properly against the stationary blade 0. The rubber cushion will allow the blade g to be depressed slightly for overcoming small inaccuracies which may result from imperfect grinding, while the adjusting-screws j enable the blade to be set properly, so that the range of elasticity given by the cushion i will be sufficient to make the blades when once adjusted always meet each other at the cutting-point. This movable blade g and its frame are oscillated by means of the cam d striking a projection, 0, Fig. 4, at one end of said frame.

The swinging frame G has a transverse pressure-rod, k, bearing a spiral spring, the end or head of which pressure-rod strikes the lower end of one of the armsfand forces the clamp bar against the stationary blade 6. As soon as the clamp-bar strikes said blade and locks the paper upon it the spring upon the pressure-rod It allows said rod to yield while the swinging frame G is completing the rest of its stroke, the clamp meantime remaining stationary and being held in position by all the force of the spring.

Small pendants l are hung upon the rod on which the clamp-bar F is mounted, for the purpose of directing the edge of the paper when first fed through the rolls down between the clamp-bar and the stationary blade 6. lnas much as the paper is clamped during the action of the shear-blades,it may be fed continuously, the effect of which will be only to cause a bend or gather in the paper above the clamp and between it and the feed-rollers. So soon as the clamp is released the resiliency of the paper will cause it to shoot forward into the same position that it would have been had it not been stopped by the clamp. It is, however, desirable to so form the cam which actuates the swinging blade and frame as to make its action as quick as possible, so that the paper need be locked but a moment.

The pair of cone-pulleys before referred to are for the purpose of adjusting the feed, or, rather, adjusting the revolution of the camshaft, so that the shears will work at shorter or longer intervals, and thereby cut a longer or shorter sheet of paper. The adjustment of the belt upon said pulleys is effected by means of the screw-shaft H, which operates the shipper I and brings the belt to different points upon the cone-pulleys. This feed, however, is an ordinary device, and is not claimed by me except in combination with the other parts.

I have herein represented the cam-shaft E in most of the figures, as in front of the swinging blade 9; but, if desired, it may be placed in the rear of said frame, as illustrated in Fig. 6, in which E represents the cam-shaft and d the cam, which, instead of acting upon a projection at the upper end of said frame, acts upon the projection m, formed upon a horizontal arm, a, at a point between the shear-blade and the fulcrum on which it swings.

Many of the details of this machine may be changed without departing from the essential features, which consist mainly in the adjusta ble and cushioned knife and the clamp-bar for locking the paper while it is being cut.

I have also represented a roll. of paper at K, from which the machine is supplied; but it may be taken from a roll upon some other machine instead of upon the cutter itself.

I am aware that prior patents show shearblade-s combined with an elastic cushion and adjusting-screws in a different manner from that herein shown and described.

Y I claim as my invention- 1. In a paper-cutting machine, a knife held in contact with an elastic cushion between said knife and its bed by means of screws loosely connected to said bed, the cushion being located at a point nearer the cutting-edgeof the blade than are the holding-screws, whereby the blade may rock so as to tip its side edges, substantially as described, and for the purpose specified.

2. The combination of a pairof shear-blades, 0 g, the bed for supporting the broad side of the blade g, the elastic cushion t, against which the broad side of the blade rests, the set of screws h, for holding the broad side of the blade in contact with said cushion, but loosely connected to the bed, so that the blade may rock and tip its side edges, and the set of adjusting-screwsj, for acting upon the cushion near the cutting-edge of the blade 9, substantially as described, and for the purpose specified.

3. The combination of the main frame bearing the fixed blade, the frame G, carrying the movable blade, the pressure-rod mounted in the frame G, the spring mounted on said pressure-rod, the arms f, and clamp-bar F, mounted on said arms, substantially as described, and for the purpose specified.

4. The combination of the main frame, hearing the fixed blade 0, the frame G, bearing the blade and carrying it edgewise by the fixed blade with their broad sides toward each other, the bed on the frame G, which the broad side of the blade g faces, and the elastic cushion interposed between said bed and broad side of the blade, substantially as described, and for the purpose specified.

5. The combination of the continuously-actin g feed-rollers, the fixed shear-blade 0, frame G, blade g, and spring pressure-rod 70, mounted on said frame, the arm sf, clam p-bar F, mounted on said arms, and the camshaft E, bearing cam 11, for acting upon the frame G.

ROBERT BINNS.

Witnesses:

WM. F. VAN AMRING-IG, EDWARD W. AVERY. 

